And then there where none

In August 1939 eight strangers are invited in a perched held in Soldier Island, an island off the coast of Devon, the mysterious spouses U.N. Owen, they have never personally known. When you arrive at the venue are greeted by two servants newly recruited, Thomas and Ethel Rogers, but the hosts are mysteriously absent. While guests dine and they talk to each other, a voice coming from a gramophone blames everyone present, including two home, of having committed a murder.